Exposes what the v3 vertex/material render path computes internally:
per (layer, x, y), returns {slot, rot, flip} for material cells,
nil for non-material. Override entry wins (normalised via existing
normalize_override_entry); otherwise resolves through
compute_cell_bitmask_v3 + SLOT_LOOKUP.
Primary consumer: debug-overlay tooling (map-editor 0.2.0c.3) that
labels each rendered cell with its blob-14 slot identity for
authoring verification.
57 B
57 B